Consider just shutting WU down...it's ruined. Every day there's something wrong.
Problem is, is there any other site that allows you to upload PWS data and view it in the same manner, i.e. record data from all sensors (including things like soil moisture and UV), log all the data long-term, and allow you to review it? There's nothing much like it that I've been able to find. Sure, there's a ton of sites where you can upload weather data, but typically it's short-term only, and/or they only allow a limited set of sensors, and/or their display options are pretty limited. Is there actually a replacement?
The people that denounce WU and to get rid of them either accept the mediocrity of other online services like limited historical data, limited sensor reporting all exactly as you mentioned...or they are individuals that have rolled up their sleeves and launched their own domain and website. A task that is not simple unless you are technically inclined and requires more hardware and software and maintenance and costs.
People should understand that different people have different needs. The simplicity of publishing to WU has merit and so why wouldn't we want it to be the best that it can be. I've yet to see another online service provide rapidfire live data that is updated every few seconds. Other reasons are for example people that depend on WU for smart irrigation controllers like my Hunter Hydrawise that only works on WU data. Sure I could invest in a Rachio and use PWSweather but I've already invested in Hydrawise because I feel the interface and customization is more powerful.
If someone claims that they can get rid of WU because none of this matters and you are okay with something else, well all I have to say is that my neighbor has you all beat, he doesn't own a weather station and say he lives Florida and doesn't need a weather report, he is perfectly happy just looking out the window.
So you are totally right.