no, you can have a natural hairline that looks like male pattern baldness, but part of male pattern baldness is the actual miniaturization of the hairs, they continue to grow back thinner, shorter, lighter, and fall out sooner, to finally nothing, this can be very fast in some, and take 30 year in others...
there is a difference between a high hairline, and one that is high, or starting, that has those always distinguishable miniaturizing hairs
general rule, if you are losing over 100 hairs a day, with visible miniaturization of appearance, and of the individual hairs, its male pattern baldness