Say what you will about Jupyter notebooks and all that, but the talent pool for Python is still at a higher level. Then, this could be the worse-is-better equilibrium, but there's also a market-for-lemons situation regarding web dev these days.
My impression was that top-dollar was being payed for web-devs, with competition from some of the biggest tech giants driving the trend. Not sure that's a market for lemons, unless you are talking about the lower-end of web dev.