@Meybi It's the nature of business, play it safe, follow the trends and profit.
It really ruined western tv and hollywood. Hollywood doesn't need good writers because they make the bulk of their money from foreign profit (china mostly) and they eat up pretty special effects so they don't need to try anymore. Live action reality tv is so stupidly cheap to produce so it just pretty much swarmed most tv networks.
I suppose an argument can be made that this self insert escapism is what the new younger demographic of manga in Japan enjoy. High academic expectations, peer pressure, a brutal work culture, and the decline in relationships and sex. It's a bit telling of the times ahead.