Very true. I recall Bozza or someone mentioning last summer, about the lack of successful strikers in the PL in 16/17.
I reckon Ulloa won't at his age with his lack of mobility, cut it as a PL striker any more. Murray's older, but he's kept trim and IMO is the exception that proves the rule.
Ulloa would demand PL level wages (huge), for a striker who rarely scores and is well into his thirties (we already have Murray in that age group, so let's not add another).
Far better to spend PL wages on a younger new striker.
The Argus reporting (stating the obvious?), that Ulloa won't be coming back. The right decision IMO, as he offered little in his second spell and he would take a slice of the payroll budget that could be used for new playing staff.