That is right Joe but I was just pointing out that it was more than French intervention in North America. The British also ended up fighting the French and Spanish in the Med and eastern Atlantic as well as in the Caribbean and the French in India - plus during the conflict a related war against the Dutch also broke out. It is impossible to say one way or the other as to whether these other European powers entering the conflict ultimately swung the balance or not and eventually convinced the British to seek terms. What ifs are by their nature improvable. It was bound to have made a substantial impact though.

As to the Irish thing it was pretty similar to the Jacobite threats. The French and British were continually at loggerheads if not all out war. The 45 Jacobite Rebellion was also ultimately dependent on a French invasion which ultimately never happened. Excepting that it is debatable whether the French monarch actually really cared which member of the British royal family was on the throne anyway. Just because the French invasion never happened doesn't mean it was a complete failure for them and they were probably happy with the outcome. Their stoking the fires of rebellion in Britain meant that ultimately large swathes of the British and Hanvorian army on the continent was withdrawn from the main theater of war to defend England and regain control in Scotland. That was of great advantage to the French and strengthened their position immensely. Within a couple of years Britain and France were at peace. The British insisted that one of the terms was that France exile the Stuart Pretenders which the French were happy to concede to. The Stuarts were simply expendable pawns in a much wider French strategy as were the Irish at other times.