Not at all.
Had the planned Lockheed L-193 tanker actually been brought instead of more KC-135s then its possible that Lockheed might have had a ready-made jetliner competitor by 1960. Two potential pitfalls though might have been its double-decker fuselage which was going out of trend and the twin paired nacelles in the wingroots would have made engine upgrading more difficult. It might also mean no Electra and thus no P-3 Orion....
The jet generation was a great leveller. The piston giants like Douglas and Lockheed were not assured huge success, former biplane/racer builders like de Havilland could be big, SNCASE could hit it on the world stage, Boeing and even Soviet OKBs like Tupolev and Ilyushin became world famous as much for their airliners as their bombers. Wright lost its mantle as the prime provider of airliner propulsion, Rolls-Royce beat Bristol the interwar radial king, DH moved from powering sedate Tiger Moths to Comets. With such disruptive technology the scope was there to make it big if you had the right kit and the right prices - brand loyalty mattered little.
I'm surprised that you haven't included another Boeing what-if, if the 747 development costs had killed Boeing in 1969 and drove it to bankruptcy (they owed over $2billion at one point). Arguably at that point Boeing may well have been saved by US government intervention or taken over (McD buy Boeing in 1970?). Perhaps fatally killing the 747 and if so that probably kills the JT9D and robs Airbus of one of its alternative engines.
It's probably too late to save the RB207 by this date and arguably puts increased pressure on Rolls-Royce to get the RB211 sorted for Lockheed TriStar who will want to fill that market before the CF-6 powered McD DC-10 does. Equally possibly the US government or P&W succeed in salvaging the JT9D by ousting RB211 from the TriStar. That would mean no commercial use and a lot of egg on the British industry (and government's) face. Either way it makes the A300 engine choices shaky.
Assuming the UK leaves in April 1969 as historical, the collapse of Boeing and the 747 is too late to reverse that but it might mean the Heath government does some fast and furious bidding to rejoin and get the RB211 on the A300 to save something. Seeing the JT9D vanish, Airbus might just agree to fit the 211 as an alternative engine choice.
Assuming the UK never leaves, the whole Boeing/747/JT9D debacle gives Rolls-Royce some bargaining room - telling Airbus "fit the 211 or we'll sell it to Lockheed and they're 2-3 years ahead of you" (as is the DC-10).