A freeze and a fraud alert are different animals.
A fraud alert is authorized under the FCRA, while the terms and conditions of a freeze are based on CRA policy or state regs.
Technically, fraud alerts can only be placed by the named consumer or their designated representative.
However, the CRAs have a standard practice of assuming that when a consumer raises any issues of possible fraud or identity theft, they will assume that it infers a request for a fraud alert. That is, in my opinion, a reasonable and good practice that I would not contest.
A consumer always has the right, under the FCRA, to withdraw a fraud alert at any time by sending notice, along with proof of identity, to the CRA.
A fraud alert can be an inconvenience if you are currently applying for credit, as the party must personally contact you before any approval, but it is otherwise not a big deal.
However, a freeze will have different procedures for removal, and there may be additional restrictions.