Yes it'll be helpful for you and your clients, until everyone does it, at which point hand-written becomes meaningless. At that point it's both no longer helpful for you to drive commercial results, but also it means anyone who wasn't using it in a commercial way, will now have lost the signalling power of handwriting because the reader can no longer differentiate between someone writing a handwritten letter, and someone sending a digital letter through a handwriting middleman service.

In other words, a bit of a race to the bottom.

As for your appraisal company, I'm not familiar with it. I am familiar with the Dutch appraisal companies, which spam the shit out of municipalities with automated legal objection letters, overwhelming the paralegal capacity, and they make money off of a combination of upfront legal fees (paid not by the homeowner, but by the municipality, as 'everyone deserves access to the law' here) and savings on the property taxes. It's really approaching spam and has blackmail elements, as if the municipality doesn't respond within a legal timelimit, there can be fines or moneys awarded on-top.

All of this is great for the individual owners who use the service, but terrible for the municipality and thereby for society. After all, the municipality is now doing a lot of unnecessary work responding to automated and entirely free (spamlike) appraisal objections. Of course the municipality's budget is paid for by the tax payers. So everyone is in the end paying for this nonsense, in the form of higher tax rates.

Not only that, but in the Netherlands it's lead to a system where the appraisal values are severely distorted downwards, and compensated with higher property taxes. Instead of taxing 1% of $1 million market value, they'll simply appraise it at $600k and set the property tax at 1.6666%. Nobody can reasonably argue the $1m home is worth less than $600k, so the municipality is freed from these appraisal spam companies, and is still raking in the same tax revenue. But these unnaturally low appraisals are distorting other things (e.g. the national wealth taxes which are based on these undervalued municipal appraisals) and it's all not pretty.

None of this is good for society and I'm pretty disappointed that we're now seeing tech move further into the field of spam, even in a physical sense.