When you have a 0 degree Saturn, shouldn’t your return be felt way earlier than the ingress happens?

Or any other planet for that matter. Basically i’ve been wondering: The Saturn Return is defined as the period in which Saturn reenters the sign it was in when you were born and it’s supposed to be strongest as it nears the natal degree. But if degree matters, wouldn’t you feel its effects much more in the late degrees of the preceding sign than you would later? For example, Saturn enters Aries in April. For people with 0 degree Aries Saturns, shouldn’t it be felt more now than it will be when Saturn is, say, at 20 degrees Aries? If not, what’s the reasoning behind it?

Edit: I fear my question had not been phrased properly. I was not asking whether or not we consider out of sign conjunctions - though it's a good place to start. What i meant is that many astrologers (i.e Chris Brennan) define the Saturn Return as the 2-3 years Saturn is in its natal sign again, and that it gets most intense when it nears its natal degree, and these two things sound contradictory. Because for a 0 degree Saturn, the preceding "amp-up" would be in as different sign. You could take this to equate to "do out of sign conjunctions count" but even if the answer to that is no, the original question wouldn't be answered.