Since IP spoofing could be done by a few malicious hosts, is it really accurate to consider a DoS via ip spoofing 'distributed'? Sure the source IPs may appear

Since IP spoofing could be done by a few malicious hosts, is it really accurate to consider a DoS via ip spoofing 'distributed'? Sure the source IPs may appear to come from all over, but that's just an illusion. When I think DDos, I envision thousands of compromised hosts all over the internet making requests to a target to consume resources.