Medical Wellness Center Warns against mixing Fin and Dut?

Hello, I (23M) have been taking finasteride since the age of 20, and have been seeing less than ideal results (still receeding, withonly a slight slowing in the recession) up until now. As such, I think it might be time for me to shift over to Dutasteride.

I was looking into approaches to take to shift from Fin to Dut in a safe way, and a way that would allow me to not see a spike in my scalp DHT levels, and found that most people will essentially incorporate it slowly by replacing a few doses of Fin per week with Dut until they have fully switched over (over 3 months or so), or will just take them in tandem for 3 months or so.

As I was looking into getting a Dut prescription though (Medical Wellness Center), I found a strong warning against combining Dutasteride with Finasteride. Is this something I should give much weight?

Thank you in advance for your advice!

PS. Yes, I plan to start incorporating Minoxidil soon enough, but I want to make sure I get to a point of stability first. And, I don't want to have any other variables affect my assessment of the other medications' efficacy on me personally for now.