>>1643402This is the park tool.
Now explain to me how a piece of metal pipe, with slots cut in it with a hacksaw, and pried out a little, is going to damage a steel headtube. Explain to me the functional difference between the homemade and the pro shop tool.
Have you even ever done this before?
I would pose the exact same question about a fancy bearing press vs a piece of threaded rod with some nuts and washers.
And no, not being suitable to convert into a modern hardtail with a fork which even if it was compatible would probably cost more than the entire bike, is not 'something to keep in mind'. It's missing the entire nature of the bike.