It is no longer compulsory for tests in schools, so perhaps the facility could explain why they are insisting on it, especially now that tests have to be paid for. You haven't said if the staff there have to wear masks nina. Sorry you are having this additional expense. It is so wrong.
I can understand any apprehension some still have about catching covid despite having all the jabs. I have a niece who has 4 boys and the youngest has so many conditions, she fears for him catching it.
Covid is still spreading easily as we recently found out. The unexpected can and does happen. Two hours working alongside two workmen in our house build, and my DH caught it and passed it onto me. He had not been in contact with anyone else for weeks. That was five weeks ago. I always considered myself healthy but I'm still having after effects.