yes, which had little to do with Sony, the gaming market was already moving in that direction in the early 90s with violent games aimed at teens/young adults like Mortal Kombat & Doom becoming big hits.
you are giving Sony credit for something that was already happening before they even got into the game. games aimed at this age group were releasing more frequently in the years leading up to PS1 and would have continued to increase in quantity & popularity with or without Sony.
Most of it had to do with sony being in the market and it being a great platform for 3rd party devs. It's games were by and large different than nintendo's games or sega's. There's still is a world of difference between sony's and nintendo's games which have very focuses in terms of demographics. They still follow the same pattern in terms of games. Sony releases a ton of games aimed at teenagers and adults while releasing some kid games. Nintendo releases a ton of games at kids and "everyone"s but release a handful of token games for teens/adults.
The PS1 comes out and introduces alot of different kinds of games to consumers, breaks sales records never imagined at that point. The stigma of gaming being a kid's hobby dies off around that time. Hmm... That makes me wonder what the cause of that was.
It must have been because of kid hobby reinforcing stigma nintendo or in it's death bed sega that rarely released any games.... That's so hard to figure out.