There are a lot of mixed up discussions going on here. Some people are generally anti-law enforcement, some are against warrantless wiretapping, others are concerned about backdoors from a technical perspective. I'm with you though I'm not sure being against warrants is a sensible position.
most folks are ok with warrants if used judiciously and sparingly when the evidence is compelling and the potential (societal) good overwhelmingly outweighs the (individual) harms. but we've been sliding down that slippery slope for decades now, and it's unclear that many (most?) warrants meet any sensible criteria, instead treading into paranoid, corrupt, and vindictive territories.