You can't legally gift money above a certain value though without paying taxes on it. The situation depends a lot here, but if it were legal to just gift everybody money without interest nobody would ever have to deal with inheritance taxes.
Germany allows a few 100k tax free every 10 years depending on the exact relationship.
+ "Usual" Christmas / birthday / marriage gifts etc which can be substantial
ref: https://www.nerdwallet.com/article/taxes/gift-tax-rate#:~:te....
Unless you have a net worth way above $10 million dollars you don't need to worry about the gift tax. If you accidentally forgot to report a $30,000 "loan" that turns into a gift to a friend, the IRS isn't going to care. You might have to go back and fix it if they notice but it isn't going to be a problem.
The gift tax exists to prevent extremely rich people from cheating the estate tax. If you've never heard of the gift tax before you don't need to worry about.