Does it mean that by using an P2SH-P2PK address I indissolubly and irrecoverably bound my chances to recover forked funds to the fate of Armory?

No way to do this via methods similar to what is described here https://www.reddit.com/r/BitcoinAirdrops/comments/7io9d4/guide_retrieving_bitcoin_gold_from_segwit_address/ or here https://bitcointalk.org/index.php?topic=2689834.msg27503623#msg27503623?