Lol not rlly. Plenty of good artists got their start from tracing and referencing other images first. I don’t think it’s a problem for people to start small and get better until they learn new things.
Edit: wanted to add that it’s obvious they should credit original creators. In addition, there are mannyyyy artists on Pinterest and DeviantArt that actually create pose references for the purpose of helping learning artists grow. They just have to follow the required rules.