I've only been tracking it since 2 years ago, and 2020 had similar approval/denial rates. Unless you have more information, may I suggest your 'fact' is more based on general impressions than actual reality. I see this often in my groups, people saying "don't bother applying, they are rejecting everyone right now" 'facts' when really is based on them going to the interview, seeing the people in front of them being denied 2-3-4 people, and building this idea it happens to 'everyone'.
The US tourist visa process is a black box and visa officers never disclose why they rejected you (unlike Schengen) and so that leaves people to hypothesize and pass often repeated theories as facts, some of them being repeated on this same thread.
Having a contact in the US makes it easier for a tourist to overstay, because they might have a place to stay, people who may connect them to under the table jobs. So, while there are no statistics about this, I've seen some tv show like 'Border Control' (or something) where suspected tourists are stopped at Immigration control when they fly in, and the Immigration Officers are allowed to check the tourist's personal phone and see if there's any conversations/emails/chats with people about jobs (which I assume would be people in the US already).
all it means is someone at the embassy has to send a templated letter back to the congressman and be pissed off that they had to do that. Congressmen do not have any power to adjudicate on a person's profile as a potential tourist.