No one is perfect, nor should try to be. Asking someone to have enough consideration for others to not show up late to everything isn’t asking for perfection.

We have zero idea what someone else is going through.

You’re right. That applies to you as well. Everyone has to put effort into showing up and most people have obstacles to deal with.

Sorry but your struggles aren’t more important than anyone else’s. Not less, but also not more. You’re not a martyr for showing up. If you struggle with physical or mental issues, I’m sorry, I hope you’re getting help and have a good support system.