The argument counter dnssec is that if you are trying to find some random A record for a server, to know if it is the right one, TLS does that fine provided you reasonably trust domain control validation works i.e. CAs see authentic DNS.

An argument for DNSSEC is any service configured by SRV records. It might be totally legitimate for the srv record of some thing or other to point to an A record in a totally different zone. From a TLS perspective you can't tell, because the delegation happened by SRV records and you only know if that is authentic if you either have a signed record, or a direct encrypted connection to the authoritative server (the TLS connection to evil.service.example would be valid).

So it depends what you expect out of DNS.