The marriage of a priest and a convert in our time

Peace to the rabbi
I wanted to ask what the rabbi’s opinion is regarding the marriage of a priest and a convert at this time. From the Torah, the prohibition is specifically for a ‘prostitute’ and the Sages ruled that ‘there is no prostitute but a convert,’ in addition of course to the normal halachic definition of someone who has had marital relations with a person who is forbidden to marry.
1. What is your opinion on the very idea of ​​”there is no prostitute but a convert” in our day? Is it appropriate to accept it in every situation (even when the past can be clarified)? Is the technical situation in which the Rabbinate prohibits the marriage of a priest and a convert (because of a prostitute) but permits the marriage of a priest and a Jewish woman by birth (without clarifying whether she has violated a prohibition that would define her as a prostitute) a halachically necessary conclusion?
2. From a more theoretical perspective – how can the definition of ‘there is no prostitute but a convert’ be reconciled with ‘a foreigner who converts like a baby born of blood’? It does not seem to be a defect (like a bastard), but rather a kind of spiritual stain created by the person’s own transgression.

Thanks in advance.