I would say we still need to be accountable to one another and why Hebrews 10:25 is important.
I'm not saying that it's not.
But if we focus on what others are doing, their failures, etc..., while ignoring our own issues.... we're not following Jesus. We're following others.
Fellowship, as defined in Hebrews 10:24-25, Ephesians 4, 1 Cor. 12-14, is to build, strengthen, and encourage each other to continue to follow Jesus.
Here's an anecdote I've heard off an on over the years. I think it makes my point quite well.
The Pastor And The Glass Of Water
"A lady went to her Pastor and said 'Pastor, I won't be going to your church anymore.'
The Pastor responded ' Ok. But I'd like to ask why?'
The lady said 'Ah! I saw a woman gossiping about another member; a man that is a hypocrite; the worship team living wrong; people looking at their phone during service; among so many other things wrong in your church.'
The Pastor replied 'OK. But before you go, do me a favor: take a full glass of water and walk around the church three times without spilling a drop on the ground. Afterwards, leave the church if you desire.'
The lady thought: too easy! She walked three times around the church as the Pastor had asked. When she finished she told the Pastor she was ready to leave.
The Pastor said, 'Before you leave I want to ask you one more question. When you were walking around the church, did you see anyone gossiping?'
The lady replied 'No.'
'Did you see any hypocrites?'
The lady said 'No.'
'Anyone looking at their phone?'
'No.'
'You know why?'
'No.'
'You were focused on the glass, to make sure you didn't stumble and spill any water. It's the same with our life. When we keep our eyes on Jesus, we don't have time to see the mistakes of others. We will reach out a helping hand to them and concentrate on our own walk with the Lord.'"
The more occupied we are with doing what we've been told by Jesus to do, the less time we'll have to focus on the shortcomings and failures of others.
Moreover, Jesus did not say that the world would know us by our doctrinal orthodoxy. He said the world would know we are his followers by our Love one for another.
Read Revelation lately? Did you know that the Church of Ephesus almost got booted because they lost their first love.
Jesus praised them for everything else, but said unless they returned to their first love, he'd remove their candlestick......
1 “To the angel of the church of Ephesus write,
‘These things says He who holds the seven stars in His right hand, who walks in the midst of the seven golden lampstands: 2 “I know your works, your labor, your patience, and that you cannot bear those who are evil. And you have tested those who say they are apostles and are not, and have found them liars; 3 and you have persevered and have patience, and have labored for My name’s sake and have not become weary. 4 Nevertheless I have this against you, that you have left your first love. 5 Remember therefore from where you have fallen; repent and do the first works, or else I will come to you quickly and remove your lampstand from its place—unless you repent. 6 But this you have, that you hate the deeds of the Nicolaitans, which I also hate.
7 “He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes I will give to eat from the tree of life, which is in the midst of the Paradise of God.” ’