I do think Broadway broadly has a marketing problem but this essay doesn't really support its thesis very well. The Six example is particularly very odd, considering Six came over here already having built a dedicated following through its cast album and media appearances in the UK.
But Broadway marketing often seems like it's behind the times and trying hard to catch up, particularly in regards to social media. Some productions have had authentic social media breakouts, like Oh Mary, Death Becomes Her, John Proctor, etc, while others just seem to be looking at those successes and go, "let's do that, too" and make their cast jump on whatever TikTok trend was hot a month before. Authenticity, or at least the appearance of authenticity, is really key in things like this.
Broadway also does not seem to have adjusted to the shift away from advance ticket purchasing to purchasing closer to performance. I think more could be done to either incentivize advance sales or lean into day/week-of purchasing.
But yeah fundamentally, Broadway has to contend with a unique problem in entertainment- it is fixed to a single geographical location, which means if you're not in the immediate area, the cost burden of seeing a show has to include travel, accommodation, meals, potential loss of income if you need to take time off from work, etc. A $200 ticket is essentially going to end up costing several times more. This isn't a fixable problem and it can be mitigated basically only two ways: cheaper tickets, which make recouping even harder, or the show becoming such a hot ticket that people are willing to shell out a lot of money, which is a major gamble.
"...everyone finally shut up, and the audience could enjoy the beginning of the Anatevka Pogram in peace."