Well, the Buddhists are more optimistic than that! They have lots of techniques and ways of thinking to reduce suffering. I recommend reading up on their life philosophy, they’re far from nihilists.
The main doctrine of Buddhism is that eternal bliss is possible, how is that not optimistic? I'm a Jodo Shinshu Pure Land Buddhist and as far as I can tell all Buddhists believe in this, it's the third noble truth after all.
To me it seems more optimistic to think that our current life is somehow limited and flawed and that a mind and experience beyond it is possible (Buddhahood) than to think that it's not possible and we are stuck as limited suffering beings.
You’re talking about mobile games. I have to kids, 4 and 6, and the only games we’ve introduced them to are 1) board games and 2) Nintendo Switch games. This largely avoids the problem (for now!)
The thing with content is that it costs money to produce, and so you (generally) have to pay money to get it.
I know some parents who have super strict "screen time" rules but let their kids watch (during the allotted time) any random dumb youtube show, or play those shitty iPad games. Those parents are not tech savvy, and they assume that all digital experiences are shit.
In contrast I pay lots of money for Nintendo first-party games because I know (I play them too!) that they are engaging digital experiences with good screenwriting. I pay recurring subscription to streaming services and apps because real storytelling for children DOES exist on devices with screens!
They need to explain themselves to shareholders (why did they hire so many people in the first place, expensive) and employees (so that people want to keep working there also in the future).
It sounds like you really want it to be vaccines even though not much seems to be pointing towards that conclusion, be careful to avoid a bias. The article mentions cancer and cardiovascular chronic diseases.