Maybe it depends on how each company organises their budgets for marketing, sales etc.
It does cost a lot to attend a show, stand space is not cheap, There are costs in taking materials to and from the shows, staff have to be housed and fed while they are there. And, the base is shortstaffed before, during and after the show. The profit generated by sales at and after the the show ought to cover those costs; but you have to sell an an awful lot of stock to cover those costs.
Some companies are prepared to write off the losses and cover them by the Sales and Marketing budget. Others may not be able so to do.
If you have ever organised, or even exhibited on a club stand at a show, you will know how much disruption preparing for, and then putting away afterwards, can be.
When I, as an ordinary Club member, organised the P S M E stand at the Spalding Show, it effectively occupied five days for me. To organise and load my exhibits, travelling (at my expense ) to set up the stand the day before, two days at the show, and then another day to put away all my exhibits. And this does not include the time spent cajoling folk into exhibiting, and then liasing with the show organisers over stand space, and location.
Every club will have had similar experiences, many with longer distances to travel to the venue.
Even more so for trade exhibitors. Did you see the size of the articulated lorry carrying the Warco exhibits to shows? At least a day to load a 40 ton artic boxvan, another day travelling from Surrey to say Doncaster, and then to set up the stand, two or now three days staffing the stand, a day to pack up, then to travel back to base, followed by unloading. All these items cost time, and therefore money, money for staff and their expenses. For a big stand, that can occupy a week in total. And only the show days will actually cause an inflow, probably too small to cover costs, of cash.
Fairies with magic wands seem to absent at those times.
I love to browse the machines displayed at a show, although I am unlikely to buy a new Lathe or Milling Machine very year. But I do realise what is involved in terms of cost and personnel to attend. Consequently, I can sympathise with those who decide that financially it is no longer worth the disruption and effort.
Rose tinted glasses are strictly for visitors, not exhibitors!
Howard