I don't know if it's that simple.
Should we be thankful that there are lots of realtors? We should be thankful there is enough real estate and the price is accessible (at least for some of us). Realtors are a means to an end, not an end in themselves.
I liken it to web ads. The worst web ads will attempt drive-by downloads or are simply obnoxious -- loud, obtrusive, clickjacking, forced-redirects, autoplayed video on pay-per-bandwidth connections, ill-designed for different form-factors, badly layered under/over content. Then again, some ads are perfectly tailored, unobtrusive, small, and fast. Most people generally don't complain about the latter. They don't install AdBlockers to avoid the latter. But the latter are collateral damage of people avoiding the former.
> how lucky they are for being stalked by recruiters
This is not costless. I stopped answering my phone because it was causing context switches while at work and affecting my productivity. Eventually I figured out that I needed to unsubscribe from recruiter lists (some of which were probably email-confirmation spam traps) and to completely obfuscate my job search profiles while I was not searching.