Yes, it's not a great security practice, and it probably should work more like "we've noticed you have randomly changed your search engine from google/ddg/bing/whatever to this 'random search engine no-one heard about'' instead of blindly reverting to edge and bing.
It seems to be a tool for tech illiterates. A power user will know how to avoid malware, and remove it if they catch it.
They should do a much better job than that, but helping people that don't know what they're doing is not itself a bad thing.