I haven't seen your donor area after 7k grafts, feel free to PM me so I can advise you better. I see you have started Finasteride, not a bad thing necessarily, I am a strong advocate of the medication but usually in people who are in the early stages of hair loss. I don't really see much benefit in you taking a pill forever considering you were Norwood 5 plus before, sure it may protect your donor and thinner midscalp but you can always add a few grafts there to get the same result you have now. So I don't see the benefit in your situation and not to mention if you have had depression/anxiety before and are on meds for it, it may worsen it. If it regrows your top massively in 6 months (super responder), of course stay on it. That is how I would think of it in your shoes bro looking at the pros and cons.
I can say I haven't had a single side on it all these years or lost any hair, and I think 9/10 people are in that boat but 1/10 do get temporary sides. You were one of those so be careful especially considering you don't have much native hair to maintain. If you see your donor deteriorating, perhaps get on the medication but I think aggressive guys don't respond as well to it anyway. Also I don't think your donor will deteriorate at least for 20 years, you've reached your final pattern and your Doctor would have said otherwise.
I know a while back hairliciously had a second transplant to take his forehead down from 8.5cm to 7cm apparently and after 4k grafts, his back and sides looked very bald and it was the first thing my girl said. I don't know his total donor numbers, final pattern or finasteride usage (don't care much these days about hair) but in his case there is a benefit to taking the medication. As he could end up very bald in the donor and with thinning behind the hairline too which is a vicious cycle. TBH I am thinking he had a poor donor capacity or inept graft harvesting because it looks like he had 10k grafts taken out. I have a 10k donor capacity but after 2500 odd there is no thin spot if I have long hair, medium length or zero fade.