What? No. Finders keepers? So if you lost your mobile or hardware wallet on the street, you would have no problem with someone breaking in to it and emptying your wallets? How is that any different to emptying out a paper wallet you found which does not belong to you? Sure, OP is highly unlikely to get caught, but that hardly makes it morally OK.
I think this is not the same as hardware wallet. If it is hardware wallet, the seed phrase is still secure and safe than to be compromised, unlike a private key that that is written on a paoer or card or where it was easily found written, I can assume it to be like that. If it is a hardware wallet, I can report it to the appropriate governmental organization for appropriate action to look for the right owner, but if it is a paper wallet that everyone can see the private key easily written just on paper, I can think otherwise, especially in the kind of country I am that I know everyone are ready to scam you, including the government officials. I may just leave the coin there for years, later just move just like 1/10 of the coin, I can do that for like 10 years. If no one moved the coin after so many years, then the coins are mine.
But if the remaining coin is moved to just one address, I will think the owner of the coin has known that his paper wallet has been compromised and moved the coin to another wallet. I can send worth of 9/10 of the total coin to the address the remaining coin was sent toamd I will have 1/10. Just my opinion.