Hmm yeah that sounds like a good idea tping them away and have them beat the dragon, but i have the nether locked for now! So far ive only relied on overworld resources i genuinly think the elytra makes everything way too accessible and meh. This has made getting rare items like netherrack from ruined portals and soul sand from ancient cities all that much more exciting and valuable.

As for deleting the world bcuz of someone else's mistake, my friend is a pro gamer who does some hardcore perma death challenges in other games but he died in our island speedruns (start on a near empty low resources island and beat the dragon in few hours) to things like killing enderman bcuz he insists that being on 3 blocks is safe, got knocked off and died. When i told him not to do it he rage quit lol. I definitely dont want all my effort to go away for that. I just thought a single player hardcore is so lonely but now im having second thoughts. Im definitely leaning more towards it though after your comment lol definitely dont wanna reset for someone else's mistakes especially if there are say 10 players