It is optimized for time to market and low cost. JS devs are a lot cheaper than the alternatives and the output (crappy and bloated as it is) runs ok-ish on most platforms without much effort if you have a new-ish fast computer with lots of cores, an SSD and 32+GB RAM, which most of the developers and execs ofc do.

The end user on the other hand often uses a device that's a lot slower and/or older and are often running lots of these turd apps at the same time eating up ressources and bogging their system down.

Fuckers should be forced to use a 5 year old laptop with 4GB of ram a few days a week 😆