Not sure if this help but:
A program that generates “exactly” the sequence HTHTT
Alongside this program there is program that generates HHHHH and HHHHT and HHHTT etc − 2^5 of such programs, and before seeing evidence HTHTT is just one of those not standing out in any way. (but I don’t know how specifically Solomonoff induction accounts for it, if that is your question)
Important fact about rocket is that it provides some fixed amount of change of velocity (delta-v). I think your observation of “how long strong gravity slows me” combined with thinking in terms of delta-v budget and where it is best spent brought intuitive understanding of Oberth effect to me. Analysing linear trajectory instead of elliptic one also helps.