TPM has features like remote attestation and is in general a mechanism to bind data to hardware, which is interesting for DRM purposes.
Sure, there are theoretical attacks on memory, but they are far less relevant for security than the penalties I have to accept with TPM being widely established.
Not that there aren't different means, but TPM also creates unique hashes of your system which only reinforces the problems around fingerprinting.
> It's the exact system that enables wireless payment and other strong security features on your phone.
Phones suck as computing devices on every conceivable metric and are heavily locked down devices. And it is not true that you need a TPM chip to create secure transfers. I constantly do business transaction on my PC just fine.