1My anchor: since the nineties
Not "I learned this over time" but "I saw it early on – thirty years only confirmed it".
Few in the room know competitors beyond their brochures: prices, delivery capacity, customers' appetite to switch.
As blind to their own strengths as to their weaknesses, management included.
The exception: a company that gathers market data systematically and can look at itself
→ but that company has no need for a SWOT workshop (a subordinate clause is enough)