3. Good Roleplaying is Hard.
This can be true, but in D&D you choose the character you roleplay ....... unless you are a DM .... and then you can still choose to change the entire encounter and NPC.
I generally play women characters, not always but usually and I find I can roleplay them well (at least I think so) and I enjoy it. However I never play a woman Cobold, Lizardfolk or Dragonborn because I have realy trouble doing that well.
When it comes to accents I am awful, so most of the time I don't do it as a player.
4. Representation, Stereotypes, and Roleplaying.
There are two things I would like to note here.
1. First much of the rules themselves are based in stereotypes. For example the entire Samarai subclass is based on tropes of Asian samarais. There are other less obvious stereotypes, but they are there. It is difficult to completely avoid these and still play anything that looks like actual D&D.
2. While real-world stereotypes exist, many things are criticized which have no real world counterparts. An example is the racial abilities and specifically intelligence penalty to Orcs that was taken out. I am all for taking that out and it was stupid to be in there to start with. I am also for making the abilities movable as this enables more creativity and options. But this was painted as some sort of prejudice when in fact there are no actual Orcs in the world and a D&D "race" is not equivalent to a real-world "race".
Finally I will note that people can play what they want at their table and the metric by which it should be judged is not whether it is "right" or
"wrong" but rather if the people at the table are having fun. In organized play there certainly needs to be ground rules to ensure no one feels unsafe or pigeonholed and new groups forming up should talk about this in session 0. However in private games with people who know each other well and have played for years this can be completely different and the important element is if everyone is having fun.