Interesting articles.
However, I don't think the situation is quite as unsavory as you, or the BBC article suggests, from the BBC article:
"The visa scheme - which attracted allegations it was being abused by migrants seeking access to western Europe - ended on 17 October, by which time some
40,000 Iranians were said to have flown to the Balkan nation."
But:
"According to Info Park, a refugee support centre in Belgrade, Serbian police estimate the number of Iranians who failed to return at
12,000."
Of that 12,000, there is no indication how many remained in Serbia, and how many chose to travel on.
In addition, another source suggests:
"More than
15,000 Iranians have visited Serbia since visas were abolished"
https://www.rferl.org/a/serbia-abol...-abuses-by-some-migrants-to-eu-/29539329.html
Nearly a third of that suggested by the unattributed BBC source: " 40,000 Iranians were said to have flown to the Balkan nation."
Edit:
So, it is possible we have 15,000 visited Serbia, and 12,000 returned to Iran. Of the remaining 3,000, we don't know if they traveled on-wards or remained in Serbia. Sorry, getting my various numbers confused.
12,000 failed to return.
But assimilating all that information, we can
infer that these Iranians spend hundreds of €s for their air travel to Serbia, then may spend 3,000€ to 6,000€ on false passports, then many more €s on onward travel, including hotel or hostel accommodation, and/or people smugglers.
They are then charged an extortionate amount to risk their lives in a passage across the channel, by people smugglers.
If these people have 10,000€ to 20,000€ (or more, having totally divested themselves of their life in Iran) to 'invest' on a risky attempt at migrating to UK, they must be educated, relatively wealthy people. Therefore they would be well aware of the dangers ahead.
So for mb to suggest that they are ill-informed and not desperate seems to me, to be a biased, politically motivated
inference.