I think yabu, yes I would prefer my DD to spend all day reading but realistically this is the 21st century, and Roblox and Minecraft are not the enemy. There are far worse games to play. Minecraft at it's best is creative.
My daughter loves Roblox, she has grown out of Minecraft now (she is ten, she did like it aged 8). I agree it can be horribly addictive. But Roblox has been a lifeline because my DD chats on Facetime or Skype on her phone whilst playing Roblox on the laptop. She has been able to avoid any MH problems in lockdown simply by having that regular opportunity to natter to her friends, play cooperatively in group games, roleplay etc. Roblox has improved her confidence talking in groups (but not talking over people), negotiating which games to play, taking turns, etc.
She has also had a go at coding, too, as there are lots of YouTube videos that help teach that for Roblox. But in honesty we have mostly relied on it for fun and interaction with friends.
I do think it is important not to isolate children from their peers by cutting them off from modern life. I had a school friend whose mum refused to have a TV in the house so that she could focus on reading and schooling, she grew up totally excluded from conversations with peers, became an oddball, was bullied. I befriended her at university (we were both Oxbridge), she was nice but still very withdrawn. Despite having an amazing education, she didn't flourish, she never got over her feeling of being an outsider. She became an alcoholic and got a dead end job. Obviously it is an extreme example but I'm just making the point that it can be very damaging to be on the outside of social conversations with peers.
For me, it is balance in all things.