In my little corner if the world, I started to be recognize as a reference because I was defending our hobby in school board during the satanic panic period. I was often asked to go to other towns to "speak" to concerned people about our hobby and I was also running exhibit games so that they would better understand and accept the game for what it is, a game.
During BECMI, 1ed, 2ed, 3.xed, 4ed, I occasionally had questions about player management. Twice or thrice a year. And I had a lot of contacts even back then. I was involved in a lot of tournaments and exhibit games. So far, I have received more questions about player management than all other editions combined as these questions are almost every time we have our Friday Night Dungeons. It did not started immediately, it took about two years to really start and it rose in frequency a wee bit before the pandemic.
I wonder if YouTube style game shows are to blame though. They set the bar pretty high for new DMs to reach for. And these DMs allow a lot of leeway to their players. It not a bad thing per say, but it might explain some expectations that new players have. Unconsciously they might wish to start as the pro they see on YouTube thus creating backgrounds unsuitable to a DM's table and not understanding that what they see on the net is not necessarily the norm nor is it something that all DMs are ready to allow. They want to emulate what they watched but it is not necessarily what a DM wants to offer.
My first advice is often to have a session zero or at least a presentation of the DM's world and premises of his/her campaign before any character should be made. This usually correct the situation. But still... 5ed removed a few of the tools a DM had to adjust the game and the ones offered are optional, making them less than useful for inexperienced DMs. I wonder if we might not have a combination of factors here that make the problems so many new DMs have. (And some old one too it seems).