When companies ask for signatures to be done in a certain way, it’s often not because those things are a requirement to be a valid contract under the law, but because they want more evidence to support them should the contract be brought into question in court.
You could theoretically, in some cases, run a business on nothing but verbal contracts, but you would be foolish to do so because you’d have difficulty proving anything if it were disputed.
Yup, there was a literal act of congress that made e-signatures legally valid but it's not worth arguing with anyone who asks for an "ink" signature ime.
Yet Ford repeatedly insisted I print out the documents, sign them, and scan them. I tried a digital signature anyway - and they called me out on it.