This paper investigates the factors shaping public dual perceptions of Artificial Intelligence (AI) - apprehension and enthusiasm - using data from 72 job-based forums on Reddit, spanning occupations with varying levels of AI exposure, from actuaries to firefighters. Analyzing textual data from 2009 to 2024, the study reveals a twofold narrative: while many express concerns about job displacement, professionals also increasingly incorporate AI into their work, emphasizing its productivity-enhancing potential and a general willingness to adapt. Regression analysis shows that professionals who frequently use mathematical, cooperating problem-solving skills in their work shows less concern about job displacement, whereas professions centered on teaching and sales engage more with discussions on AI usage. Pivotal technological milestone like the release of ChatGPT also affects public perception, supported by evidence from Synthetic Control Method.