If it seems like my parting line has widened, should I get a hair loss test?

The amount of hair that falls out when I wash it is not particularly large.

However, when I take photos, it bothers me that my scalp around my parting seems a little more visible than before.

It could be the natural process of hair thinning with age, but judging solely by sight seems to have its limitations.

I am looking into it because I think it would be good to check my current status rather than waiting until I start losing weight noticeably.