OK, let's put this one to bed!
When I plan a route and I'm considering alternates, I look closely at the airspace between my route and each proposed alternate as part of the selection process. If I end up having to divert to one of my alternates (by routing direct) and there is controlled/restricted airspace between me and the alternate, then I use SD to tactically navigate my way under, over or around the said airspace, using SD's excellent airspace and NOTAM warnings or, if appropriate, I will contact the controlling authority, and request a transit clearance.
When I learnt to fly, and in the years following, GPS was the stuff of science fiction! Until the advent of SD, my flying was done using paper charts, a stopwatch, a ruler/protractor and, of course, Mk1 eyeball, and was mostly non-radio. Over the years, I have flown my fair share of diversions using this 'technology' and compared with this, any diversion using SD is a breeze.
Mike
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Samsung Galaxy Tab A8 – Android 11.0 & SD 4.2.2
Huawei P30 – Android 11.0 & SD 4.2.2
PC – Windows 10 (Home Ed) Version 22H2, Build 19045.6575, SD 4.2.2