Because the number of lawyers who actually know anything about DV is tiny. I have seen really bad (outright wrong) advice about DV questions on avvo, and all avvo advice anyway seems to end in “you need to contact an immigration lawyer” , even the most straightforward case. They’re on the site to drum up buisness, not out of the goodness of their hearts.
Put it this way: something like 20 MILLION people a year enter DV, of which maybe 100k get selected in a typical year. If even a fraction of the rest of the 19.9m were applying for and being denied tourist visas every year because they’d entered a lottery, don’t you think there would be complaints all over the visa forums? Yet, I’ve never once come across anyone posting that.
It’s like saying the IRS wants to audit you because you entered the $$ lottery.